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NCV97310

Description
3 Buck Regulators
File Size216KB,21 Pages
ManufacturerON Semiconductor
Websitehttp://www.onsemi.cn
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NCV97310 Overview

3 Buck Regulators

NCV97310
Automotive Battery-
Connected Low-Iq Multi-
Output Power Management
Unit with 3 Buck Regulators
Description
www.onsemi.com
The NCV97310 is a 3−output regulator consisting of a low−Iq
battery−connected 3 A, 2 MHz non−synchronous switcher and two
low−voltage 1.5 A, 2 MHz synchronous switchers; all using integrated
power transistors.
The high−voltage switcher is capable of converting a 4.1 V to 18 V
battery input to a 3.3 V output at a constant 2 MHz switching
frequency, delivering up to 3 A. In overvoltage conditions up to 36 V,
the switching frequency folds back to 1 MHz; in load dump conditions
up to 45 V the regulator shuts down.
The output of the battery−connected buck regulator serves as the low
voltage input for the 2 downstream synchronous switchers. Each
downstream output is adjustable from 1.2 V to 2.8 V, with a 1.5 A
average current limit and a constant 2 MHz switching frequency. Each
switcher has an independent enable and reset pin, giving extra power
management flexibility.
For low−Iq operating mode, the low−voltage switchers are disabled
and the standby rail is supplied by a low−Iq LDO (up to 150 mA) with
a typical Iq of 30
mA.
The LDO regulator is in parallel to the
high−voltage switcher, and is activated when the switcher is forced in
standby mode.
All 3 SMPS outputs use peak current mode control with internal
slope compensation, internally−set soft−start, battery undervoltage
lockout, battery overvoltage protection, cycle−by−cycle current
limiting, hiccup mode short−circuit protection and thermal shutdown.
An error flag is available for diagnostics.
Features
1
32
QFN32
MW SUFFIX
CASE 488AM
MARKING DIAGRAM
1
NCV97310
33
AWLYYWWG
G
A
WL
YY
WW
G
= Assembly Location
= Wafer Lot
= Year
= Work Week
= Pb−Free Package
(Note: Microdot may be in either location)
ORDERING INFORMATION
See detailed ordering, marking and shipping information on
page 20 of this data sheet.
Low Quiescent Current in Standby Mode
Programmable Spread Spectrum for EMI Reduction
2 Microcontroller Enabled Low Voltage Synchronous
Buck Converters
Large Conversion Ratio of 18 V to 3.3 V Battery
Connected Switcher
Wide Input of 4.1 to 45 V with Undervoltage Lockout
(UVLO)
Fixed Frequency Operation Adjustable from 2.0 to
2.6 MHz
Internal 1.5 ms Soft−starts
Cycle−by−cycle Current Limit Protections
Hiccup Overcurrent Protections (OCP)
Individual Reset Pins with Adjustable Delays
QFN Package with Wettable Flanks (pin edge plating)
NCV Prefix for Automotive and Other Applications
Requiring Unique Site and Control Change
Requirements; AEC−Q100 Qualified and PPAP
Capable
These Devices are Pb−Free, Halogen Free/BFR Free
and are RoHS Compliant
Typical Applications
Infotainment, Body Electronics, Telematics, ECU
©
Semiconductor Components Industries, LLC, 2016
1
April, 2018 − Rev. 8
Publication Order Number:
NCV97310/D

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